Understand the differences between hereditary and histamine-mediated angioedema, including their symptoms, causes, and ...

While allergies are the main cause of hives, stress can also contribute to the itchy red bumps that make up a rash. Here's ...

Hives (urticaria) are a common skin reaction that causes bumps, raised patches, or both. They are one way the body responds to an allergen or trigger. Reactions can be uncomfortable but aren’t ...

Chances are, you may know a family living with food allergies. Food allergies are more prevalent than many realize, ...

Solar urticaria is a rare allergic reaction to sun exposure. The condition causes an itchy rash or hives that appear on any skin that has been exposed to the sun. The more skin that is exposed to ...

Hives are a type of rash that are usually caused by an allergic reaction, a bacterial infection, or even stress.

CINCINNATI (WKRC) — As temperatures drop, some individuals may experience an unusual allergic reaction to the cold, known as cold-induced urticaria. Dr. Sandra Hong from the Cleveland Clinic explained ...

Hives (urticaria) may appear as pink-red bumps, or patches on your skin, and are very itchy. They are often signs of an allergic reaction but can also be idiopathic, meaning the cause is unknown.

Aquagenic urticaria is an extremely rare type of hives (raised, itchy rash) triggered by contact with water. Some people call aquagenic urticaria "water allergy." Urticaria is the medical term for ...